Pump coupling



H. P. KRAFT.

PUMP COUPLING. APPLICATION FILED 02c. 19. 1919. ,mizwco MAR. 23. i922.

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a lication filed December 19, 1e19, serial'no. 346,017.

ump Couplings, of which. the following is siding. in Ridgewood,

a specification.

pumpcouplings for pneumatictires,,such

or the like, andaimsto PIOVlClG certainim valve. Usually the nut .tion and nut in elevation, 45

tube. is the foot portion of the This invention relates. to pumpcouplings provements thereinq I The invention is particularly directed to couplings usually comprising a shank adapted to be connected with an inflation tube, and a. nut, adapted to be screwed. on the tire is swivelled to the be turned independ- The packing washer is usuthe lower face of the shank, and according to former constructions difficulty was had in removing the washer for purposes of repairs. In my application No. 177,005 I have shown and described a pump coupling in which the nut portion is made separate from the swivelled portion, and is provided with a non-rotative connection therewith, such nut portion being held in place so that it can be removed without removing the swivelled portion, and the washer being easily accessible. The present invention relates to a simplification of the device of the aforesaid application, and provides a cheap and simple structure in which the nut portion. can be easily removed. and replaced.

Referring to the drawings, which illustrate one form of the invention,--

Figure l is an elevation of the pump coupling provided by the invention.

Fig. 2 is a diametrical section, showing the coupling applied to a tire valve.

Fig. 3 is a view, showing the shank por with the swivelled connection in diametrical section.

Fig. 4: is a bottom face view of Figure 1.

Fig. 5 is anelevation of the nut portion detached. i

Fig. 6 is a view of the retaining ring.

Fig. '7 is a bottom plan view of Fig. 3, the swivelled connection being shown in section.

Referring to the drawings, let A indicate the coupling as a whole which commonly is provided. with a serrated shank B, over which is slipped the end of the inflating coupling shank so that it may ently thereof. ally locatedon fit within the foot portion, a hexagonal recessG, asibest. seen in Figwhich is sometimes formed, as anintegral part of the shank B, and is sometimes. formed .as a separate member D which is swivelled to the shanlgxas shown in the drawing.

Accordingto the aforesaid application the nut portion is made. separatelyfrom the foot portion, and. is provided with a 11011. ,circular connection therewith. This is retained in the present construction, the nut portionbeingshown ashaving flatsF which ure 4.

, Accordingto the present invention .lproa Vldfl a means in the member D, comprising for retaining the nut portion member adapted to besprungdnto place, so. as to overhang both portions. Tlhe member' I prefer to employ is a split ring H, which is sprung into a groove 1 in the member D. The ring H is enabled to pass into the groove by the cut-away portion J of the nut. In order to facilitate the removal of the ring, I prefer to provide a slot K in one side of the member D, as shown in Figure 3. A. tool may be inserted through this slot to a position under the ring, whereupon the ring may be lifted out by the tool.

I prefer to provide the nut with a tapered inner face L, which fits a corresponding taper M on the interior of the member D, and the cut-away portion J of the nut is also preferably tapered. This secures a firm seating of the nut in the member D.

By this construction the nut can easily be removed so that the packing O which is shown as being arranged at the lower end of the shank B, can be easily removed and replaced.

It will be understood that the construction herein described is useful for other purposes than pneumatic tire pump couplings, and it will also be understood that I do not wish to be limited to the precisev construction shown, since various changes may be made therein without departing from the spirit of the invention.

What I claim is:

1. In a pump coupling or the like, the combination of a member having a passage through it, a nut-holding portion connected thereto, a nut having a non-rotative connection with the nut-holding portion, and

.lt'enewedlvlarch 23, 1922. Serial No. 546,182.

the latter having tit) an elastic therein.

3. In a'pump coupling or the like, the combination or a shank having a passage through it, a nut-holding portion connected thereto, a nut having a non rotative connection with the nut-holding portion, and

' a spring member for retaining the nut there- 4. Ina pump coupling or the like, the combination of a shank, having a passage through it, a nut-holding 'portionconne'cted thereto, -a nut having a non-rotative connection With said nut-holding portion, and an expansion ring for retaining the nut therein.

5. In a pump coupling or the like, the

, combination of a shank having a passage portion. swivelled to said shank,'a nut having a nontherethrough, a nut-holding rotative connection with said nut-holding portion,1and a spring member for retaining the nut therein.

6. In a pump coupling or the like, the combination of a shank having a passage therethrough, a nut-holding portion swivelled to said shank, a nut having a nonrotative connection with said nut-holding portion, and a. spring ring for retaining the nut therein.

7. In a pump coupling or the like, the combination of a shank member having a passage therethrough, a nut-holding portion having a bevel interior face, a nut having a bevel face fitting against the bevel face of the nut-holding portion, said nut-holding portion having a groove, and a spring ring lying in said groove.

8. In a pump coupling or the like, the combination of a member having a passage through it, a nut-holding portion connected thereto, a -nut having a non-rotative connection with the nut-holding portion, and a spring member for retaining the nut therein, and said nut-holding portion having a slot for the. removal of said spring memher.

In witness whereof, I have hereunto signed my name.

HENRY P. KRAFT. 

